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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/91761

91761

ZIP 91761 is in Ontario, California, in San Bernardino County; area codes 909 and 840; Pacific time. Ontario has 4 ZIP codes; the others are 91758, 91762 and 91764.

Type
Standard
Time zone
America/Los_Angeles
Population
62,935
Coordinates
34.0356, -117.5915
☼ Live from 91761 — Ontario, CA

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Local time: —

Where 91761 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 91761
  • 🔢 Type 91761 into a pocket calculator and turn it upside down: IgLIG — not quite a word, sorry.
  • ➕ As a number, 91,761 = 3 × 73 × 419. Its digits add up to 24, a total 2,425 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011001110001
  • 🏠 Its numerical neighbours: 91759 (Mount Baldy, CA, 17 mi away) and 91762 (Ontario, CA, 5 mi away).
  • 🔄 Backwards, 91761 becomes 16719, which is not a ZIP code at all.
  • 👥 21 other ZIP codes are made of exactly the same digits (11697, 11769, 11796, 11967, 11976, 16917, …). The farthest-flung twin is 11976 in Water Mill, NY, 2,498 miles away.
  • 🧭 Farther south than 79% of all ZIP codes, and farther west than 90%.
  • 🎯1,121 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91761 and you would come out at 34.04°S, 62.41°E — 1,003 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 25m of daylight. Shortest: 9h 53m.
  • 📏 At 28.5 square miles of land, 91761 is bigger than 45% of ZIP codes — room for about 22 Central Parks.
🌙 The sky over 91761 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population62,935This ZIP62,935
Households18,440This ZIP18,440
Housing units18,922This ZIP18,922
Median age34.7This ZIP34.7California37.9US 38.9
Median household income$100,578This ZIP$100,578California$99,122US $80,734
Median home value$635,000This ZIP$635,000California$734,700US $332,700
Median gross rent$2,136This ZIP$2,136California$2,036US $1,413
Bachelor's degree or higher23.9%This ZIP23.9%
Mean commute32.6 minThis ZIP32.6 min
Population density2,208.9 / sq miThis ZIP2,208.9 / sq mi

Business and tax activity

Business establishments2,910This ZIP2,910
Employees80,635This ZIP80,635
Annual payroll$5,027,406,000This ZIP$5,027,406,000
Tax returns filed31,070This ZIP31,070
Total adjusted gross income$2,083,393,000This ZIP$2,083,393,000

Land area

Land area28.49 sq miThis ZIP28.49 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 91761

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 91761

ZIPCityDistance
91743 Guasti, CA 2.1 mi
91764 Ontario, CA 2.8 mi
91758 Ontario, CA 3.9 mi
91752 Mira Loma, CA 4.4 mi
91730 Rancho Cucamonga, CA 4.5 mi
91762 Ontario, CA 4.7 mi
91729 Rancho Cucamonga, CA 4.9 mi
91710 Chino, CA 5.6 mi
91786 Upland, CA 6.3 mi
91708 Chino, CA 6.4 mi

Find every ZIP code within 10 miles of 91761 →

Questions about this ZIP code

Where is ZIP code 91761?

91761 is in Ontario, California, in San Bernardino County, part of the Riverside-San Bernardino-Ontario, CA metropolitan area. Its published point location is 34.0356, -117.5915.

What county is 91761 in?

91761 lies in San Bernardino County.

What area code is 91761?

Ontario uses area codes 909 and 840, from NANPA's telephone records.

What time zone is 91761 in?

91761 uses America/Los_Angeles.

How many people live in 91761?

About 62,935 people live in ZIP code 91761, in 18,440 households, at 2,208.9 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 91761?

$100,578 a year, against $99,122 across California.

What ZIP codes are near 91761?

The closest are 91743 (2.1 mi), 91764 (2.8 mi), 91758 (3.9 mi), 91752 (4.4 mi) and 91730 (4.5 mi).

Is 91761 a PO Box ZIP code?

91761 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91761 ZIP Code — Ontario, California (San Bernardino County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91761

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